The Atmosphere Atmosphere 4.0 / 5 based on 1 rating ? ChemistryThe earth and its atmosphereGCSEOCR Created by: emmmalleyCreated on: 01-08-14 17:35 What did the air consist of for the first two billion years? steam CO2 and Nitrogen 1 of 4 What happened in the next two billion years? Atmosphere was all CO2 and green plants evolved all over the earth 2 of 4 What is the air mainly made up of today? Nitrogen (78%) Oxygen (21%) Argon (1%) 3 of 4 Which pollutants are humans putting in the air? CO2, Carbon Monoxide, Particulates, Sulfur Dioxide and Nitrogen Oxides 4 of 4
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